{% if site.clipboard %}
<script src="{{ assets_base_url }}/assets/js/clipboard.min.js"></script>

<script defer>
(function() {
	var snippets = document.querySelectorAll('pre');
	[].forEach.call(snippets, function(snippet) {
		snippet.firstChild.insertAdjacentHTML('beforebegin', 
    `<div id="clipboard-copy" aria-label="Copy" class="btn mg-8" data-clipboard-snippet>
        <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy clipboard-trigger">
          <path fill-rule="evenodd" d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 010 1.5h-1.5a.25.25 0 00-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 00.25-.25v-1.5a.75.75 0 011.5 0v1.5A1.75 1.75 0 019.25 16h-7.5A1.75 1.75 0 010 14.25v-7.5z"></path>
          <path fill-rule="evenodd" d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0114.25 11h-7.5A1.75 1.75 0 015 9.25v-7.5zm1.75-.25a.25.25 0 00-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 00.25-.25v-7.5a.25.25 0 00-.25-.25h-7.5z"></path>
        </svg>
        <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check clipboard-success">
          <path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path>
        </svg>
      </div>`);
	});
	var clipboardSnippets = new ClipboardJS('[data-clipboard-snippet]', {
		target: function(trigger) {
			return trigger.nextElementSibling;
		}
	});
	clipboardSnippets.on('success', function(e) {
		e.clearSelection();
		showTooltip(e.trigger, 'Copied!');
	});
	clipboardSnippets.on('error', function(e) {
		showTooltip(e.trigger, fallbackMessage(e.action));
	});

	var btns = document.querySelectorAll('.btn');
	for (var i = 0; i < btns.length; i++) {
		btns[i].addEventListener('mouseleave', clearTooltip);
		btns[i].addEventListener('blur', clearTooltip);
	}

	function clearTooltip(e) {
		e.currentTarget.setAttribute('class', 'btn mg-8');
		e.currentTarget.removeAttribute('aria-label');
	}

	function showTooltip(elem, msg) {
		elem.setAttribute('class', 'btn mg-8 tooltipped tooltipped-w');
		elem.setAttribute('aria-label', msg);
	}

	function fallbackMessage(action) {
		var actionMsg = '';
		var actionKey = (action === 'cut' ? 'X' : 'C');
		if (/iPhone|iPad/i.test(navigator.userAgent)) {
			actionMsg = 'No support :(';
		} else if (/Mac/i.test(navigator.userAgent)) {
			actionMsg = 'Press ⌘-' + actionKey + ' to ' + action;
		} else {
			actionMsg = 'Press Ctrl-' + actionKey + ' to ' + action;
		}
		return actionMsg;
	}
})();
</script>
{% endif %}